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(N o Model.) 3 Sheets-Sheet 1.

J. E. CARPENTER.

WOOD POLISHING MACHINE.

No. 392,663. Patented Nov. 13, 1888 (No'ModeL) 3 Sheets-Sheet 2.,

J. E. CARPENTER.

WOOD POLISHING MACHINE.

No. 392,663. Patented Nov. 13, 1888.

(No Model.)

. 3 Shets-Sheet 3. J. E. CARPENTER.

WOOD POLISHING MACHINE.

Patented Nov. 13

mm khnn at dramas ATENT mica.

JAMES E. CARPENTER, OF BERLIN, WISCONSIN, ASSIGNOR TO THE BERLIN MACH INE XVOEKS,

OF SAME PLACE.

WCOD POLISHING ACHINE.

SPECIFICATION forming part of Letters Patent No. 392,663, dated November13, 1888.

Application filed September 30, 1887. Serial No. 251.149. (No model.)

.To aZZ whom, it may concern:

Be it known that 1, JAMES E. CARPENTER, of Berlin, in the county ofGreen Lake, in the State of WVisconsin, have invented new and usefulImprovements in Machines for Polishing WVood, of which the following isaspecificatlon.

My invention relates to the well-known machines used for sandpapering,and especially to the adjusting devices for determining the parallelismof the sand-cylinder and the table which overlies the same, and which iscommonly known as the sand-guard, and also for regulating the depth ofthe out to be given by the action of the sand-paper, and also to themechanism for imparting an axiallylongitudinal reciprocating motion tothe revolv-' ing sand-cylinders, and to other parts de signed forperfecting the operation of the machine, which will be hereinafterspecifically pointed out.

As the general construction of such niachiues is well known, it will beunnecessary to set out more than the portions of the machine to which myimprovements are applied.

The machine to which my improvements are specially applicable is formedof a main frame carrying a series of sand-paper cylinders, the peripheryof which, appearing through a slot in the sand-guard, acts upon a boardwhich is introduced between positively-actuated feedrolls carried partin the main frame and part in a vertically and independently adjustableframe,which also carries the pressure-rolls.

In the annexed drawings, making part of this specification, Figure l isa perspective View of my improved machine; Fig. 2, a side View, partlyin section; Fig. 3, a longitudinal sectional view through one of thecylinders.

The same letters are employed in all the figures in the designation ofidentical parts.

The main frame carries a series of preferably three sand-papercylinders, marked, respectively, No. 1, No. 2, and No. 3. More or fewermay be employed. The adjusting mechanism, hereinafter described, isapplicable to each of the cylinders and its sand-guard, and isduplicated to any extent required. To describe its application to onewill therefore be 5o sufficient.

Immediately under the shaft of each cylinder I place a through-shaft, A,which projects at both ends beyond the main frame, and carries on theoverhung ends swinging arms B, which are pivoted at one end to theframe, and are adjustable at the free end vertically by means of theset-screws 13 passing through lugs on the main frame. The adjustment ofthese set-serews regulates the position of the shaft A. YVhen thisadjustment has been made, the arm 13 is confined further by a set-screw,

B passing through a slot therein. On the same shaft A, I place,immediately inside the frame on both sides, other arms, 0, Figs. 2 and3, which are attached to the shaft by set- 6 5 screws 0, so that whenthe arm is turned at one end it will turn the shaft and the corresponding arm at the other end of the throughshaft A. The arm 0 isactuated on one side by a bar, 0 attached thereto by a bolt. This bar 0extends out through the main frame at the end of the machine, and isfastened to an extension, 0, by a bolt, 0. The extension is surroundedby a sleeve, G the two parts being connected by a male and femalescrew,and the sleeve is turned by a hand-wheel, As the sleeve isconfined in the frame, so that it cannot move lengthwise when it isturned, the bar (1 will be drawn or thrust so as to swing the arm 0.

The arm 0 is formed with a segmental eccentric-slot, O, to receive awrist-pin, D, attached to the vertically-sliding frame E, which carriesone end of the sand-cylinder shaft, G. This frame slides in waysattached to the main frame, and is raised or lowered by the action ofthe eccentrioslot C on the wrist-pin D. A corresponding arm and frame atthe other end of the cylinder-shaft G and shaft A similarly raise orlower that end of the cylinder-shaft. 0 As shown in Figs. 1, 2, and 3, aslot, E, in the frame E permits this to be done without interference bythe shaft A, which passes through. the slot and also allows the shaft tobe independently adjusted by means of the arms 13.

Similar mechanism is attached to all the sand-cylinders, so as to permittheir independent adjustment in relation to the sand-guards F for thedetermination of the amount of the out. These sand-guards are alsoindepend- I00 ently adjustable, with a view to establishing andmaintaining their perfect parallelism in reference to the surface of thecylinders. They are iron tables or plates covering that portion of thespace inclosed within the main frame, which is immediately over thesand-cylinders, and are slotted so as to permit the peripheries of thesand-cylinders to appear above the plane of their upper surface. Unlessthese surfaces are parallel in all parts to the cuttingsurface of thecylinder the work will be imperfect, and as heretofore constructed thepart of the table opposite the middle of the slot was liable to sagunder the pressure of the board, being unsupported except at thecorners. Struts F are attached to the main frame by dovetailed recesses,and through the struts are, passed, at one or more places, rods F",formed with threads. A nut, F, above the strut, and another below, F,determine the elevation of the point of the rod, which bears against aflange, F on the sand-guard F. One such rod may be used by attaching acollar or head, F, to support two of the tables F where their edgesadjoin.

To support the corners of the table or sandguard F, I form it with lugsF to rest upon the heads of set-bolts F, passing through lugs F on themain. frame, and with square ends beneath the lug F to receive a wrenchby which they may be turned. Through the lugs F I tap set-screws F, thelower ends of which are received in a recess formed in the upper end ofthe set-bolt F, and so look the latter when it has been properlyadjusted.

It is desirable that the sand-cylinders shall have imparted to them alongitudinally-reciprocating movement, as well as one of rotation. Theformer is provided in the following manner: Horizontal shafts II arehung on bear- :ings on the outside of; the main frame, carrying on theouter end a bevel-pinion, which may be driven by a correspondingmiterwhcel on a transverse driving-shaft, or said shaft may be otherwisedriven from any e011- venient part. This shaft carries an eccentric, H,which revolves within a frame, I-I, placed within thejaws of an arm, I,which confine it sidewise, while they permit it to play freely in theother direction. I is a cap confining the frame H The arm I is attachedto a collar, I, surrounding the cylinder-shaft G. This collar isconfined endwise between rings I,

fastened to shaft G by setserews which turn with said shaft, while theshaft rotates within the collar I. The eccentric H imparts to the shaftG a longitudinal reciprocating motion in its box L, in which itrevolves.

K is a bracket bolted to the .main frame, which carries the boxes K ofthe shaft H.

It has hitherto been usual to use a series of sand-cylinders of the samesize and revolving at the same speed to dress and polish the wood; butin these machines the work is imperfect, as the wood is left with a sortof fine fuzz on its surface. To remove this and more perfectly polishthe surface of the wood, I in troduce another preferably smaller andmore rapidly moving sand-cylinder covered with finer sandpaper, actingwith a light touch upon the surface of the wood to remove such fuzz.

The sand-paper is cut into sheets of sizes proper for covering theentire surface of the cylinders and attached thereto in any suitablemanner.

WVhat I claim as my invention, and desire to secure by Letters Patent,is

1. In combination with the sand-cylinder and shaft of a wood-polishingmachine, a throughshaft, A, carrying the cylinder-bearings, and thearmsB and set-screws for adjustably supporting the ends of the shaft,substantially as set forth.

2. In combination with the sandeylinder and shaft, the through-shaft A,frame F, having a stud-pin, D, and the adjustable slotted arm 0,regulating the position of the cylinder, substantially as set forth.

3. In combination with the sand-cylinder G and shaft G, thethrough-shaft A, adjustable arms B, swinging arms 0, and slotted frameE, whereby the ends of the shaft A can be independently adjusted andboth ends of the sand-cylinder can be equally and simultaneously moved,substantially as set forth.

4-. In combination with the sand-cylinder and shaft G, thevertically-adjustable frame F, arm 0, bar 0 and sleeve U, threadedthereon and confined so as to have only a motion of rotation,substantially as set forth.

5. In combination with the sand-cylinder and shaft G, thevertically-adjustable frame E, arm 0, rod 0 sleeve 0 confined to themain frame, and hand-wheel 0 substantially as set forth.

G. In combination with the sand-cylinder and sand guard or table F,adjusting-bar F, arranged to support the table between its ends, andstrut F, supporting said bar adjustably, substantially as set forth.

7. In combination with the sand-cylinder, main frame, and sand guard ortable F, the adjustable supporting-bolt F, and locking bolt Fsubstantially as set forth.

8. In combination with the table or sand guard F, independentlyadjustable at each end, the sand-cylinder G, independently adjustable ateach end and also simultaneously adjustable at both ends, substantiallyas set forth.

9. In combination with the sand-cylinder and shaft G, the eccentric H,shaft H, and sleeve I, and arm I, which receive a reciprocating movementfrom the eccentric and impart it to the cylinder, substantially as setforth.

10. In combination with the sand-cylinder and shaft G, the eccentric H,shaft H, frame H", arm I, sleeve 1, and rings 1, substantially as setforth.

11. In a machine substantially such as IIO shown, the c0mbinati0n,with asand-cylinder, In testimony whereof Ihave hereunto set my of a sandguard or table, F, slotted to receive hand in the presence of twosubscribing witthe periphery of the sand-cylinder and adj ustncsses.

ably supported at the corners and intermedi- JAMES E. CARPENTER. atelyso as to permit its vertical adjustment In presence of-- and alsomaintain it rigidlyin plane, snbstan- R. MAsoN,

tially as set forth. L. D. FORBES.

